One For All Signal Booster 4-way The One For All Signal Booster amplifies TV and radio signals and offers a solution for watching interference-free TV. By equally splitting signals to 4 TV's or other devices, it prevents signal loss or picture freeze caused by long cables or multiple TV-audio sets connected to one source. It incorporates a unique 3G/4G filter, filtering out and blocking unwanted interference from mobile phones delivering interference free reception.We are the specialist in Audio-Video accessories with more than 20 years of experience. The Signal Boosters are a great asset to our wide accessories line-up.1 x One For All SV9604 4 Way TV Signal Booster/Splitter; Warranty; Manual.